Venting for Fuel Injection Swap
T
I think the differnce is in the cap.
No Mopar cap is "vented." When Ma started installing the emissions vapor control (carbon can etc) the caps varied and were known as "pressure vacuum". These ARE NOT operational vents. They are pressure reliefs
There are ONLY THREE vent strategies over the years, which I've already touched on The last two are really similar
1....Up until the CA cars got evap controls, which started in '70 on some cars, the vent WAS ALWAYS the TEE fitting welded into the filler tube in the trunk
2...For a few years, the "carbon can" evap system had a vapor separator can in the trunk. A vent went clear up front, the 1/4" tube which connected to the carbon can system up front THIS IS the vent
3...Somewhere around 73? The trunk vapor separator was dispensed with, and the separator was incorporated into the top of the tank, resulting in ONLY TWO tank fittings..........the fuel supply on the sender, and the 1/4" fitting to the front. THIS IS the vent
